The effects of boredom proneness on different aspects of anger and aggression were examined. Undergraduate students (N = 293) completed the Boredom Proneness Scale (Farmer & Sundberg, 1986), the Aggression Questionnaire (Buss & Perry, 1992), and the Anger Expression Scale of the State-Trait Anger Expression Inventory (Spielberger, Johnson, Russel, Crane, Jacobs, & Worden, 1985). Two multivariate analyses of co-variance (Mancova) indicated a significant effect for Aggression Questionnaire and Anger Expression Scale total scores on boredom proneness levels. Specifically, individuals high in boredom proneness had significantly greater scores on the Hostility subscale of the Aggression Questionnaire. Also, individuals with high scores on the Boredom Proneness Scale had greater scores on all three subscales on the Anger Expression Scale (Anger-In, Anger-Out, and Anger-Control). Empirical evidence is provided for the idea that boredom may be used as a multidimensional construct. It is suggested that this construct could be used diagnostically to explore how different types of boredom affect various aspects of anger and aggression. Implications for this in therapeutic settings are discussed.